I have remapped existing curves, linearized several with the google apps, some twice… but one crv creates havoc for the QTR-Linearize-Quad droplet. It is your x900 Photo Rag cool. Due to a dead position, it has been remapped a bit, but it is still K5, the warm side now K4. This remapping has worked all the way through iterative linearizations on 2 other papers without problems.
The 1st 51 step chart made using this remapped version looks relatively ok by eye, all proceeds from light to dark. The measurement result shows parts too dark, but still going light to dark without reversals… After using the resulting CGATS txt to achieve the 1st linearization with QTR-Linearize-Quad, the resulting curve has eliminated the lightest ink entirely.
I’m mystified, I’ve remeasured, remade the CGATS and redone the QTR-Linearize-Quad several times with the same result. Does QTR-Linearize-Quad go crazy if numbers go too outside some parameters? Should I start with a smaller chart?
As I mentioned, the same remapping and linearization has worked fine through 2 other papers, the only difference being they were gloss.
I have attached images of the curves before and after the QTR-Linearize-Quad process, you can see the obvious elimination of the lightest gray and it’s % shown as 300.
Thanks, all these tools are working great so far and impress…